#include<stdio.h>
void exchange(int a,int b)
{
	int temp;
	temp=a;
	a=b;
	b=temp;
} 
int main()
{
	int n1,n2;
	printf("\nPlease input 2intgers:");
	scanf("%d%d",&n1,&n2);
	exchange(n1,n2);
	printf("\nn1=%d n2=%d\n",n1,n2);
	return 0;
}
